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Walther Bothe's Graphite: Physics, Impurities, and Blame in the German Nuclear Program
Author(s) -
Reed B. Cameron
Publication year - 2020
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.202000121
Subject(s) - german , blame , graphite , nuclear physics , physics , theoretical physics , philosophy , chemistry , psychology , linguistics , organic chemistry , psychiatry
The physics, experimental setup, and analysis of results involved in Walther Bothe and Peter Jensen's mistaken 1941 measurement of the capture cross section for thermal neutrons by carbon are examined. Their experiment, while well‐conceived and executed, was corrupted by the presence of unappreciated impurities. This erroneous measurement was crucial as it prompted a decision by German military administrators to abandon graphite as a possible moderator for a nuclear pile in favor of heavy water, a decision which set their program back irreparably.